<template>
  <div class="todo-footer">
    <label>
      <input type="checkbox" :checked="overNum===$store.state.todos.length?1:0" @click="allChecked($event.target.checked)"/>
    </label>
    <span>
      <span>已完成{{overNum}}</span> / 全部{{$store.state.todos.length}}
    </span>
    <button class="btn btn-danger" @click="clearOver">清除已完成任务</button>
  </div>
</template>

<script>
import { mapActions } from 'vuex';

export default {
  name: "FooterComponent",
  computed:{
    overNum(){
      const overNum = this.$store.state.todos.filter(item=>item.isOver)
      return overNum.length
    }
  },
  methods:{
    ...mapActions(['allChecked','clearOver'])
  }
};
</script>

<style scoped>
.todo-footer {
  height: 40px;
  line-height: 40px;
  padding-left: 6px;
  margin-top: 5px;
}

.todo-footer label {
  display: inline-block;
  margin-right: 20px;
  cursor: pointer;
}

.todo-footer label input {
  position: relative;
  top: -1px;
  vertical-align: middle;
  margin-right: 5px;
}

.todo-footer button {
  float: right;
  margin-top: 5px;
}
</style>
